Supported Networks

The SDK includes a built-in map of EVM chain IDs to human-readable network names. When you pass a chainId, the widget displays the correct network name in its approval screens.

Built-in chains

Chain	Chain ID
Ethereum	1
BNB Chain	56
Polygon	137
Moonbeam	1284
Metis	1088
Base	8453
Avalanche	43114
Avalanche	43113
Sepolia (testnet)	11155111

Using a chain ID

const auth = new OxGasAuth({
  apiKey: 'your-api-key',
  chainId: 8453, // Resolved to "Base" automatically
});

Custom networks

If your chain is not in the list, pass the name directly using the network option:

const auth = new OxGasAuth({
  apiKey: 'your-api-key',
  network: 'Blast', // Displayed as-is in the widget
});

The network option takes precedence over chainId. If you pass both, network wins.

Accessing the network map

You can import the NETWORK_NAMES map if you need it in your own code:

import { NETWORK_NAMES } from '0xgas-auth';

const name = NETWORK_NAMES[42161]; // "Arbitrum One"